Google Lighthouse performance reports include an itemized list of cookies, extensions, and scripts that may be slowing down your website. At times, you may notice /collect.js
(cdn.noibu.com) at the top of the list.
This suggests the NoibuJS script is causing severe performance issues, but this is not the case. Noibu is an asynchronous tag that wraps your entire code base. It does not block page elements from rendering. A Lighthouse test will surface elements on the website that need optimization, but since the NoibuJS script wraps everything, it is the first visible code the test encounters, and the test may falsely attribute Noibu as the cause of the latency.
Additionally, keep in mind that there is random variability in Lighthouse tests that may affect your performance scores.